[RFC PATCH v2 1/5] clk: meson: axg: move reset controller's code to separate module
Jan Dakinevich
jan.dakinevich at salutedevices.com
Wed Mar 27 18:08:27 PDT 2024
This code will by reused by A1 SoC.
Signed-off-by: Jan Dakinevich <jan.dakinevich at salutedevices.com>
---
drivers/clk/meson/Kconfig | 5 ++
drivers/clk/meson/Makefile | 1 +
drivers/clk/meson/axg-audio.c | 95 +----------------------
drivers/clk/meson/meson-audio-rstc.c | 109 +++++++++++++++++++++++++++
drivers/clk/meson/meson-audio-rstc.h | 12 +++
5 files changed, 130 insertions(+), 92 deletions(-)
create mode 100644 drivers/clk/meson/meson-audio-rstc.c
create mode 100644 drivers/clk/meson/meson-audio-rstc.h
diff --git a/drivers/clk/meson/Kconfig b/drivers/clk/meson/Kconfig
index 29ffd14d267b..d6a2fa5f7e88 100644
--- a/drivers/clk/meson/Kconfig
+++ b/drivers/clk/meson/Kconfig
@@ -48,6 +48,10 @@ config COMMON_CLK_MESON_CPU_DYNDIV
tristate
select COMMON_CLK_MESON_REGMAP
+config COMMON_CLK_MESON_AUDIO_RSTC
+ tristate
+ select RESET_CONTROLLER
+
config COMMON_CLK_MESON8B
bool "Meson8 SoC Clock controller support"
depends on ARM
@@ -101,6 +105,7 @@ config COMMON_CLK_AXG_AUDIO
select COMMON_CLK_MESON_PHASE
select COMMON_CLK_MESON_SCLK_DIV
select COMMON_CLK_MESON_CLKC_UTILS
+ select COMMON_CLK_MESON_AUDIO_RSTC
select REGMAP_MMIO
help
Support for the audio clock controller on AmLogic A113D devices,
diff --git a/drivers/clk/meson/Makefile b/drivers/clk/meson/Makefile
index 9ee4b954c896..88d94921a4dc 100644
--- a/drivers/clk/meson/Makefile
+++ b/drivers/clk/meson/Makefile
@@ -12,6 +12,7 @@ obj-$(CONFIG_COMMON_CLK_MESON_PLL) += clk-pll.o
obj-$(CONFIG_COMMON_CLK_MESON_REGMAP) += clk-regmap.o
obj-$(CONFIG_COMMON_CLK_MESON_SCLK_DIV) += sclk-div.o
obj-$(CONFIG_COMMON_CLK_MESON_VID_PLL_DIV) += vid-pll-div.o
+obj-$(CONFIG_COMMON_CLK_MESON_AUDIO_RSTC) += meson-audio-rstc.o
# Amlogic Clock controllers
diff --git a/drivers/clk/meson/axg-audio.c b/drivers/clk/meson/axg-audio.c
index ac3482960903..990203a7ad5c 100644
--- a/drivers/clk/meson/axg-audio.c
+++ b/drivers/clk/meson/axg-audio.c
@@ -12,10 +12,10 @@
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/reset.h>
-#include <linux/reset-controller.h>
#include <linux/slab.h>
#include "meson-clkc-utils.h"
+#include "meson-audio-rstc.h"
#include "axg-audio.h"
#include "clk-regmap.h"
#include "clk-phase.h"
@@ -1648,84 +1648,6 @@ static struct clk_regmap *const sm1_clk_regmaps[] = {
&sm1_sysclk_b_en,
};
-struct axg_audio_reset_data {
- struct reset_controller_dev rstc;
- struct regmap *map;
- unsigned int offset;
-};
-
-static void axg_audio_reset_reg_and_bit(struct axg_audio_reset_data *rst,
- unsigned long id,
- unsigned int *reg,
- unsigned int *bit)
-{
- unsigned int stride = regmap_get_reg_stride(rst->map);
-
- *reg = (id / (stride * BITS_PER_BYTE)) * stride;
- *reg += rst->offset;
- *bit = id % (stride * BITS_PER_BYTE);
-}
-
-static int axg_audio_reset_update(struct reset_controller_dev *rcdev,
- unsigned long id, bool assert)
-{
- struct axg_audio_reset_data *rst =
- container_of(rcdev, struct axg_audio_reset_data, rstc);
- unsigned int offset, bit;
-
- axg_audio_reset_reg_and_bit(rst, id, &offset, &bit);
-
- regmap_update_bits(rst->map, offset, BIT(bit),
- assert ? BIT(bit) : 0);
-
- return 0;
-}
-
-static int axg_audio_reset_status(struct reset_controller_dev *rcdev,
- unsigned long id)
-{
- struct axg_audio_reset_data *rst =
- container_of(rcdev, struct axg_audio_reset_data, rstc);
- unsigned int val, offset, bit;
-
- axg_audio_reset_reg_and_bit(rst, id, &offset, &bit);
-
- regmap_read(rst->map, offset, &val);
-
- return !!(val & BIT(bit));
-}
-
-static int axg_audio_reset_assert(struct reset_controller_dev *rcdev,
- unsigned long id)
-{
- return axg_audio_reset_update(rcdev, id, true);
-}
-
-static int axg_audio_reset_deassert(struct reset_controller_dev *rcdev,
- unsigned long id)
-{
- return axg_audio_reset_update(rcdev, id, false);
-}
-
-static int axg_audio_reset_toggle(struct reset_controller_dev *rcdev,
- unsigned long id)
-{
- int ret;
-
- ret = axg_audio_reset_assert(rcdev, id);
- if (ret)
- return ret;
-
- return axg_audio_reset_deassert(rcdev, id);
-}
-
-static const struct reset_control_ops axg_audio_rstc_ops = {
- .assert = axg_audio_reset_assert,
- .deassert = axg_audio_reset_deassert,
- .reset = axg_audio_reset_toggle,
- .status = axg_audio_reset_status,
-};
-
static const struct regmap_config axg_audio_regmap_cfg = {
.reg_bits = 32,
.val_bits = 32,
@@ -1745,7 +1667,6 @@ static int axg_audio_clkc_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
const struct audioclk_data *data;
- struct axg_audio_reset_data *rst;
struct regmap *map;
void __iomem *regs;
struct clk_hw *hw;
@@ -1807,18 +1728,8 @@ static int axg_audio_clkc_probe(struct platform_device *pdev)
if (!data->reset_num)
return 0;
- rst = devm_kzalloc(dev, sizeof(*rst), GFP_KERNEL);
- if (!rst)
- return -ENOMEM;
-
- rst->map = map;
- rst->offset = data->reset_offset;
- rst->rstc.nr_resets = data->reset_num;
- rst->rstc.ops = &axg_audio_rstc_ops;
- rst->rstc.of_node = dev->of_node;
- rst->rstc.owner = THIS_MODULE;
-
- return devm_reset_controller_register(dev, &rst->rstc);
+ return meson_audio_rstc_register(dev, map, data->reset_offset,
+ data->reset_num);
}
static const struct audioclk_data axg_audioclk_data = {
diff --git a/drivers/clk/meson/meson-audio-rstc.c b/drivers/clk/meson/meson-audio-rstc.c
new file mode 100644
index 000000000000..2079d24c40f4
--- /dev/null
+++ b/drivers/clk/meson/meson-audio-rstc.c
@@ -0,0 +1,109 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Copyright (c) 2018 BayLibre, SAS.
+ * Author: Jerome Brunet <jbrunet at baylibre.com>
+ */
+
+#include <linux/reset-controller.h>
+
+#include "meson-audio-rstc.h"
+
+struct meson_audio_reset_data {
+ struct reset_controller_dev rstc;
+ struct regmap *map;
+ unsigned int offset;
+};
+
+static void meson_audio_reset_reg_and_bit(struct meson_audio_reset_data *rst,
+ unsigned long id,
+ unsigned int *reg,
+ unsigned int *bit)
+{
+ unsigned int stride = regmap_get_reg_stride(rst->map);
+
+ *reg = (id / (stride * BITS_PER_BYTE)) * stride;
+ *reg += rst->offset;
+ *bit = id % (stride * BITS_PER_BYTE);
+}
+
+static int meson_audio_reset_update(struct reset_controller_dev *rcdev,
+ unsigned long id, bool assert)
+{
+ struct meson_audio_reset_data *rst =
+ container_of(rcdev, struct meson_audio_reset_data, rstc);
+ unsigned int offset, bit;
+
+ meson_audio_reset_reg_and_bit(rst, id, &offset, &bit);
+
+ regmap_update_bits(rst->map, offset, BIT(bit),
+ assert ? BIT(bit) : 0);
+
+ return 0;
+}
+
+static int meson_audio_reset_status(struct reset_controller_dev *rcdev,
+ unsigned long id)
+{
+ struct meson_audio_reset_data *rst =
+ container_of(rcdev, struct meson_audio_reset_data, rstc);
+ unsigned int val, offset, bit;
+
+ meson_audio_reset_reg_and_bit(rst, id, &offset, &bit);
+
+ regmap_read(rst->map, offset, &val);
+
+ return !!(val & BIT(bit));
+}
+
+static int meson_audio_reset_assert(struct reset_controller_dev *rcdev,
+ unsigned long id)
+{
+ return meson_audio_reset_update(rcdev, id, true);
+}
+
+static int meson_audio_reset_deassert(struct reset_controller_dev *rcdev,
+ unsigned long id)
+{
+ return meson_audio_reset_update(rcdev, id, false);
+}
+
+static int meson_audio_reset_toggle(struct reset_controller_dev *rcdev,
+ unsigned long id)
+{
+ int ret;
+
+ ret = meson_audio_reset_assert(rcdev, id);
+ if (ret)
+ return ret;
+
+ return meson_audio_reset_deassert(rcdev, id);
+}
+
+static const struct reset_control_ops meson_audio_rstc_ops = {
+ .assert = meson_audio_reset_assert,
+ .deassert = meson_audio_reset_deassert,
+ .reset = meson_audio_reset_toggle,
+ .status = meson_audio_reset_status,
+};
+
+int meson_audio_rstc_register(struct device *dev, struct regmap *map,
+ unsigned int offset, unsigned int num)
+{
+ struct meson_audio_reset_data *rst;
+
+ rst = devm_kzalloc(dev, sizeof(*rst), GFP_KERNEL);
+ if (!rst)
+ return -ENOMEM;
+
+ rst->map = map;
+ rst->offset = offset;
+ rst->rstc.nr_resets = num;
+ rst->rstc.ops = &meson_audio_rstc_ops;
+ rst->rstc.of_node = dev->of_node;
+ rst->rstc.owner = THIS_MODULE;
+
+ return devm_reset_controller_register(dev, &rst->rstc);
+}
+EXPORT_SYMBOL_GPL(meson_audio_rstc_register);
+
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/clk/meson/meson-audio-rstc.h b/drivers/clk/meson/meson-audio-rstc.h
new file mode 100644
index 000000000000..6b441549de03
--- /dev/null
+++ b/drivers/clk/meson/meson-audio-rstc.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */
+
+#ifndef __MESON_AUDIO_RSTC_H
+#define __MESON_AUDIO_RSTC_H
+
+#include <linux/device.h>
+#include <linux/regmap.h>
+
+int meson_audio_rstc_register(struct device *dev, struct regmap *map,
+ unsigned int offset, unsigned int num);
+
+#endif /* __MESON_AUDIO_RSTC_H */
--
2.34.1
More information about the linux-amlogic
mailing list